I think that they are still lovers but they also need to develop their individual careers as a possible model or actors. So it is better for them to not confirm their relationship.
They are friends and lovers.anyway they are still young anything can happed.if they already broke up why jimin still with her.there is no guy will stick by uour after break up.
jimin and yerin are my top 1 couple in 19 to 20 and i hope for them and for that they are still dating. they are a good couple and was some moments in 19 to 20 that they saw that one of them is feeling uncomfortable or sad(in the car when they had first time holding hands jimin knew that holding hands is new for yerin and than he but the jacket over their hands)i gross my fingers and hope they are still a couple.